diff mbox series

[v4,12/25] media: i2c: imx258: Allow configuration of clock lane behaviour

Message ID 20240414203503.18402-13-git@luigi311.com (mailing list archive)
State New
Headers show
Series imx258 improvement series | expand

Commit Message

Luis Garcia April 14, 2024, 8:34 p.m. UTC 
From: Dave Stevenson <dave.stevenson@raspberrypi.com>

The sensor supports the clock lane either remaining in HS mode
during frame blanking, or dropping to LP11.

Add configuration of the mode via V4L2_MBUS_CSI2_NONCONTINUOUS_CLOCK.

Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
Reviewed-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Signed-off-by: Luis Garcia <git@luigi311.com>
---
 drivers/media/i2c/imx258.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)
diff mbox series

Patch

diff --git a/drivers/media/i2c/imx258.c b/drivers/media/i2c/imx258.c
index 59a78a4cfe44..2429eb7b55c6 100644
--- a/drivers/media/i2c/imx258.c
+++ b/drivers/media/i2c/imx258.c
@@ -72,6 +72,8 @@ 
 /* Test Pattern Control */
 #define IMX258_REG_TEST_PATTERN		0x0600
 
+#define IMX258_CLK_BLANK_STOP		0x4040
+
 /* Orientation */
 #define REG_MIRROR_FLIP_CONTROL		0x0101
 #define REG_CONFIG_MIRROR_FLIP		0x03
@@ -632,6 +634,7 @@  struct imx258 {
 	const struct imx258_link_freq_config *link_freq_configs;
 	const s64 *link_freq_menu_items;
 	unsigned int nlanes;
+	unsigned int csi2_flags;
 
 	/*
 	 * Mutex for serialized access:
@@ -1066,6 +1069,14 @@  static int imx258_start_streaming(struct imx258 *imx258)
 		return ret;
 	}
 
+	ret = imx258_write_reg(imx258, IMX258_CLK_BLANK_STOP,
+			       IMX258_REG_VALUE_08BIT,
+			       !!(imx258->csi2_flags & V4L2_MBUS_CSI2_NONCONTINUOUS_CLOCK));
+	if (ret) {
+		dev_err(&client->dev, "%s failed to set clock lane mode\n", __func__);
+		return ret;
+	}
+
 	/* Apply default values of current mode */
 	reg_list = &imx258->cur_mode->reg_list;
 	ret = imx258_write_regs(imx258, reg_list->regs, reg_list->num_of_regs);
@@ -1438,6 +1449,8 @@  static int imx258_probe(struct i2c_client *client)
 		goto error_endpoint_free;
 	}
 
+	imx258->csi2_flags = ep.bus.mipi_csi2.flags;
+
 	/* Initialize subdev */
 	v4l2_i2c_subdev_init(&imx258->sd, client, &imx258_subdev_ops);